I want to know Why first struct is not OK with stackoverflow..

plz Let me Know

struct Data // My First C++ struct and it is stack overflow
{
    char name[2000][70];
    char id[2000][50];
    char descript[2000][4][200];
}

struct Data // But This case is OK.
{
    char name[2000][70];
    char id[2000][50];
}

struct Desc
{
    char descript[2000][4][200];
}
// I think it will take same stack memory. Its wrong?